Effect of zinc,phosphorus and nitrogen on tryptophan concentration in rice grains grown on limed and unlimed soils |
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Authors: | Mahendra Singh |
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Institution: | (1) Haryana Agricultural University, Hissar, India |
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Abstract: | Summary The effects of Zn, P, N and CaCO3 on tryptophan concentration in rice grain were studied in greenhouse at Haryana Agricultural University. Zinc application
upto 20 ppm increased tryptophan concentration in rice grain. Zn-EDTA gave highest increase followed by ZnSO4 and then ZnO. Liming at the rate of 4 and 8 per cent decreased tryptophan concentration significantly. Phosphorus application
upto 100 ppm also decreased tryptophan significantly but Zn in combination with P increased tryptophan and overcame negative
effect of P. Nitrogen application upto 120 ppm increased tryptophan concentration. There was positive interaction between
Zn and N. Ammonium sulphate gave highest tryptophan followed by ammonium nitrate and then urea.
The tryptophan concentration ranged between 766 ppm and 2011 ppm in paddy grain. The lowest tryptophan concentration was in
the plants treated with 8 per cent lime in absence of added Zn and highest with 10 ppm Zn through Zn-EDTA.
Department of Soils. |
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Keywords: | Liming Nitrogen Phosphorus Rice Tryptophan Zinc |
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